Microwave Solvothermal Synthesis, Crystal Structures and in Vitro Antitumor Activities of Di-n-butyltin Piperonylate with a Sn4O4 Ladder Framework

A two-dimensional supramolecular compound di-n-butyltin piperonylate, {（μ3-O）（μ2-OMe）（n-Bu2Sn）2[O2CAr（C2H4O）]}2 constructed by hydrogen bonds with a Sn4O4 ladder-like framework, was obtained by the microwave-assisted solvothermal reaction of di-n-butyltin oxide precursor with the piperonylic acid in methanol environments. The composite was characterized by elemental analysis and IR（~1H, ^（13）C and ^（119）Sn） NMR spectra. The compound crystallizes in monoclinic system, space group P21/n with a = 13.3690（12）, b = 14.1442（14）, c = 16.4022（16） A, β = 107.191（6）°, V = 2963.0（5） A^3, Z = 2, Dc = 1.520 g/cm^3, F（000） = 1368, μ = 1.719 mm^（-1）, Mo Kα radiation（λ = 0.71073 A）, the final R = 0.0495 and w R = 0.1260 for 6780 observed reflections with I 〉 2σ（I）. Its X-ray crystallography diffraction analyses show a Sn4O4 ladder-like skeleton, in which two endocyclic tin and one exo tin atoms are bonded to the μ3-O atom. In addition, one endocyclic tin and one exo tin atoms are respectively bonded to the μ2-O atom from methanol. The ladder-like molecule has a three-ring fused skeleton, which is almost coplanar. The endocyclic and exocyclic tin atoms were all five-coordinated with distorted trigonal bipyramidal geometry. The antitumor activity showed that the compound had higher activities than cisplatin in HT-29, HepG2, MCF-7, KB and A549 cell line in vitro.

IN VITRO ANTITUMOR ACTIVITY OF TUMOR-INFILTRATING LYMPHOCYTES FROM HUMAN GASTRIC CARCINOMA

Tumor-infiltrating lymphocytes (TIL) isolated from 11 gastric carcinoma were studied. TIL could grow for a long-term in medium containing recombi-nant interleukin-2(rlL-2). The mean expansion fold achieved in 6 long-term cultures of 11 specimens was 15.1. RIL-2 expanded gastric TIL exhibited significant cytotoxicity against K562, BGC823, MCF-7 and more effective antitumor cytotoxicity against fresh autologous tumor targets and human gastric cancer cell line. Peak cytotoxicity was shown in the third or fourth week after cultures. Cryopreservation of gastric TIL didn't influence their expansion capacity and antitumor activity. Phenotypic analysis was demonstrated in this study. The results of present study indicate that TIL from human gastric carcinoma could be expanded and reach high levels of antitumor effector function in long-term cultures with rIL-2. Their function may be of clinical importance.

Synthesis and in vitro antitumor activity of novel diaryl urea derivatives

A series of novel diaryl ureas containing 4-[（2-amino-6-trifluromethyl）pyrimidine-4-yl]piperazine-l-yl group were synthesized and evaluated for their cytotoxic activities in a panel of human cancer cell lines. Compared with the reference drug Sorafenib,some compounds showed more potent and a broader spectrum of anti-cancer activities.Among them,compound 2p demonstrated significant inhibitory activities against MDA-MB-231,HT-29 and MCF-7 cell lines with IC_（50） values of 0.016,0.63,0.001μmol/L, respectively.

Synthesis and structure-activity relationships study ofα-aminophosphonate derivatives containing a quinoline moiety

Two series of a-aminophosphonate derivatives containing a quinoline moiety have been designed and synthesized by introducing bioactive quinoline scaffold to a-aminophosphonate. The in vitro cytotoxic activities of target compounds were first investigated against two human cancer cell lines including Eca109 and Huh7 by MTT assay. Results revealed that most of target compounds exhibited moderate to high antitumor activities against the tested cancer cell lines and some demonstrated more potent inhibitory activities compared with Sunitinib. Among them, compounds 4b2 and 4b4 containing methylsubstituted aniline group were found to be more active than Sunitinib against both of two cancer cell lines, with IC50 in the range of 2.26 mmol/L–7.46 mmol/L.

Syntheses, Structures and Anticancer Activities of Two Tri(o-halobenzyl)tin Substituted Benzoates

Tri(o-chlorobenzyl)tin 2,4,6-trimethylbenzoate(1) and tri(o-bromobenzyl)tin salicylate(2) were synthesized and characterized by elemental analysis, IR spectroscopy, NMR(1H, 13C and 119Sn), thermogravimetric analysis, and single-crystal X-ray diffraction. The initio calculation and in vitro anticancer activity test were performed for compounds 1 and 2. They are both single tin nucleus structures and the tin atoms were tetracoordinated in a distorted tetrahedral configuration;Compounds 1 and 2 showed stronger anticancer activity than cisplatin in human cervical cancer cells(Hela), liver cancer cells(Hu H-7), non-small cell lung cancer cells(A549), lung adenocarcinoma cells(H1975) and breast cancer(MCF-7).